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Measurement

Measurement. A way to describe the world with numbers. Measurement. Can answer: How much, how long, or how far?. Everyday Measurements. Tools of Measurement. Stopwatches Meter-sticks Balances Thermometers. Metric System. International System (SI).

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Measurement

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  1. Measurement • A way to describe the world with numbers.

  2. Measurement • Can answer: • How much, how long, or how far?

  3. Everyday Measurements

  4. Tools of Measurement • Stopwatches • Meter-sticks • Balances • Thermometers

  5. Metric System

  6. International System (SI) • The SI system is the accepted system of measurement. • Units are in multiples of 10. Which of these do not belong in the metric system?

  7. Metric System • We use these prefixes the most: • kilo • centi • milli 1000 100 10 1 .1 .01 .001

  8. Converting Units

  9. Length • Meter is basic unit.

  10. Length • 1000 meters = kilometer

  11. Length

  12. Length • Use a centimeter to measure the length of a pencil.

  13. Length • 1 inch = 2.54 cm

  14. Length • 100 centimeters in a meter.

  15. Length • 1000 millimeters in a meter.

  16. Converting Units Length

  17. Mass Electronic Balance • Amount of matter in an object. • More matter = more mass. • Kilogram (kg) is used for large objects. • Gram (g) for small objects. Triple Beam Balance

  18. Mass • Mass is the same no matter where in the universe the object is located. • Weight = pull of gravity.

  19. Converting Units: Mass

  20. Weight • Gravity exerts force on an object. • More mass = greater weight • Weight changes depending on location. • Unit = newtons (N)

  21. Weight • A brick & sponge have the same volume. • Brick has more mass so, it weighs more.

  22. Weight

  23. Volume • Amount of space something occupies. • L x W x H

  24. Volume Height of box = 2 Width = 3 Length = 6 2 x 3 x 6 = 36 36 cubes like the red one would take up the same amount of space as this box.

  25. Volume of Solids • Unit is meters cubed • cm3 • L X W x H

  26. Liquid Volume • Liters & milliliters are the units. • Meniscus is the curve at the surface of a liquid. • Read at lowest point.

  27. Volume of Irregular Shaped Solids • Use water displacement. • liters or mL rather than cm3

  28. Converting Units Volume

  29. Converting Units (Volume) • 45 mL = 4.5 centiliters cL) • 45 mL = .45 deciliters (dL) • 45 mL = 0.045 liters (L) • 45 mL = 0.0045 dekaliters (dkL) • 45 mL = 0.00045 hectoliters (hL) • 45 mL = 0.000045 kiloliters (kL)

  30. Temperature • How hot or cold a substance is. • We use degrees Celsius ºC.

  31. Temperature • Water freezes at 0º C. • Water boils at 100º C

  32. Measuring Temperature

  33. Density • Amount of matter in a given volume. • measure mass & volume of an object to find density. • Unit = g/mL3

  34. Density

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